John: It was wrong of you to blame me for that traffic accident.
Principle
someone knows action X risks consequence Y person is and → responsible for action X was consequences of X undertaken voluntarily
Evaluate / Goal
The question stem is only asking about Michiko's principle, which is her second sentence.
We just need an answer choice to establish that someone voluntarily undertook an action, and knew that their action risked a certain result. The conclusion should then say that this person is responsible for that result.
(this rule does not have the power to prove that someone is not responsible, so if we see any conclusions like that, we can immediately get rid of that answer)